Switch for multiphase alternating-current motors.



2 Sheets-Sheet I.

Patented July 2, l90l.

o IIIIIIIIIIIIIIIIII//// K. VON KANDI I. SWITCH FOR IULTIPHAS E ALTEBNATING CURRENT MOTORS.

(Application filed Dec. 31, 1900.)

//IIIIII (No Model.)

WITNESSES: l MQ mum nu: am crvn cov Mara-um WASNINQYON. no.

r K. van mum.

SWITCH FOB IULTIPHASE ALTERNATING CURRENT MOTORS.

(Application Mod 1:. a1, 1900.! (No Model.) I tweets-Shout 2.

' Patented July 2, {90L mrwegiis: 2 Willow KOLOMAN VON IIANDO, OF BUDAPEST, AUSTEIA-IIUNGARY.

SWBTCH FOR MULTIPHASE ALTERNATENG=CURRENT MCTORS.

SPEGIFICATIGN forming part of Letters Patent No. 677,455, dated July 2, 1901. Application filed Docembersl, 1900. Serial No. 41,655. (No mode-Li T0 at whom, it may concern:

Be it known that I, KOLOMAN VON KAND, a subject of the Emperor of Austria-Hungary,

residing at Budapest, in the Kingdom'of-Hum gary, Empire of Austria-Hungary, have invented new and useful Improvements in Switches for Multiphase Alternating-Current Motors, of which the following is a specification.

The object of the present invention is to effect economyof space and'expense in multiphase reversed-current motors, in which for the purpose of starting and altering the direction besides a switch a maximum-current interrupter is used to prevent overloading of the motori. e., to prevent the intensity of,

sented in the annexed drawings, with the switch system of a three-phase motor m and acurrent-generator g.

Figure 1 is a vertical section of my new apparatus. Fig. 2 shows by plan views the lower interior rotary portion of the apparatus in two positions. Fig. 3 is a vertical section of the apparatus seen at right angles to Fig. 1. Fig. 4 is a cross-section of the upper part of the apparatus. Fig.5 is a diagram showing a system of electrical connections. Fig. 6 is a vertical sectional View of the upper portion of the apparatus, showing the slide Z in its raised position.

In a box a six porcelain cylinders 12 b are arranged, to the upper ends of which the cylindrical contacts 0 of the interrupter are attached. The base 6, fixed to the lower end of the rod d, is provided with insulators and holds the rods f, so that on the rod 01 being elevated the rods f enter the cylinders 17 b and by making contact with the contacts 0 close the circuit.

The rods f are interconnected in the manner shown in Fig. 2, so that when the rod 01 has been.lowered until the rods fleave the cylinders b and then turned with the base e through sixty degrees and the rods f in this position have been caused to reenter the cylinders Z) the two phases of the motor will have been interchanged and the working direction of the motor thus altered.

,slide Z and moves the latter upward.

The turning of the rod d is effected by means of the lever 25, Fig. 2, which is rigidly connected to the sleeve h. The latter engages by means of a conical projection the elongated conical groove in the rod cl. By means of the lever 25 the rod (1 can therefore he turned and fixed in any position, without hinderingthe free longitudinal movement of the rod d.

The longitudinal movement of the rod d is effected by means of the crank 't', which is fixed to the same axle as the crank k. In revolving in the direction of the hands of a clock the said crank 7.: enters the slot u in the The rod 61 is articulated to the lower part of the slide Z in such a manner that the said rod follows the slide in its longitudinal movements,

but can be revolved freely around its own axis by means of the lever t. In its highest position the crank 7c leaves the slot u in the slide Z, so that the rod (1 would fall down by its .own weight and under the influence of the spring n. In order, however, to prevent the descent of the slide, and thereby of the rod d, spring-clicks o 0 are pivoted to the slide Z. These clicks are engaged by jaws p p, which are pivoted to brackets secured to the walls of the box a and are provided with springs r.

(See Fig. 4.) As soon as the power of the current has passed a certain limit the jaws p p are drawn apart by the solenoid or the electromagnet q, actingagainst the springs 'r, Fig. 3. The rod d then falls down unhindered, so that the rods f interrupt the current independently of the cranks '5 and It, by which means, on the one hand, theoperator is prevented from receiving a shock and, on the other hand, the automatic interruption of current by hand is obviated.

The interruption of the current by hand is effected by turning the crankt farther in the direction of the hands of a clock, so that the crank it exercises downward pressure upon the slide Z. As soon as this pressure, combined with the inertia of the movable parts and the power of the spring at, is superior to the tension of the spring 3, which forces the clicks 0 0 apart, the latter clap together, the jaws 10 19 turn aside, and the red at falls down, by which means the current is interrupted.

Having thus described my invention, what IOO I claim as new, and desire to see ure byLetters" Patent, is-

1. A switch for multiphasecurrent motors, comprising a spindle havingaxial and longitudinal motion, a frame carried by said spindle, metal insulated rods mounted on said frame,stationary insulating-sockets provided with electrical contacts and adapted to receive said rods andso complete the circuit on longitudinal motion of the spindle,- means for rotating said spindle on its axis,- meansfor imparting longitudinal motion to.said spindle, a device for retaining the spindle when it has been thus operatedandan-el'ectromagnet releasing said device on the pas intensity, whereby the spindleis set free-and: can returnito its first position and ibreakthei connection.betweensaid SOCkGtrGOlltfiGtS and. metal ro,ds allsubstantially-as described.

2.. A switchformultiphasecnrrent motors,v comprising-aspindle havinga-Xial and longi tudinal motion, aframe; carried'iby s'aidispim' dle, metal insulated rods mounted onv saidv frame, stationary insulating:sockets1prov-ide,d with;electricatcontacts and adapted to re;-

ceivesaidQrods, and so complete the circuit; on'zlongitudina'limotionofthespindle, means forrrotating said spindle on its axis, a. slide articulated to said'spindle, guideways forv i said slide, meansfor. sliding, said slide and r spindle, a stationary pivotal-spring device 1 for retainingthe spindle when ithas been thus operated, a spring-engagement device pivoted to said slide and cooperating with saidretaining device, and an electromag'net releasing said device on the passage of a current above a certain maximum intensity, wherebyflthe spindleis set free and can return to its first position and break the conmetal rods, all substantially as described. a 3:The devices for longitudinally sliding,

nectionbetween said socket-contacts and retaining and releasing the spindle 01, .com-

fprising' aslotted slide articulated to'the spin-' -dle, guidewa-ys for said slide, crank mechanism engaging in said slot and traveling said slide in itsguideways, spring-clicks pivoted.

to. said slide, stationarypivotal double-armed spring-jaws. engaging; with; said; clicks: on

sition, .all substantially. as deslcribed;

1 f In witness :whereoffI have hereunto vsetimLyE :handin presenceof two witnesses,

KOLOM'AN VON' KA'NDO;

\Vitn'essesz.

EUGENE: HARRSINJI,

FRANK DYER: CHESTER;

; travelof; theslide, armatures:carriedibylsaid: Y jaw-a-r ms, and-an.e-lectromagnelt;w-hiolr,on;the;

passe-goof agicurrent above aic'ertain maxiemum intensity, openssaidzj a'ws:by attracting said armatures,-thus releasingsaidsclicks' andv allowing the spindle to return to its first p051 

